为 The Death of Gwen Stacy 寻找最佳的标准套牌，包括其胜率、热度，以及该牌在万智牌：竞技场中的合法赛制！
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I − Destroy target creature.
II − Each player may discard a card. Each player who doesn't loses 3 life.
III − Exile any number of target players' graveyards.
